Systemic Formulas Bio Function DB12 Digestives + Vitamin B12

Our assessment

Our assessment: The product Systemic Formulas Bio Function DB12 Digestives + Vitamin B12 contains calcium, and the evidence shows calcium supports bone density and neuromuscular function [NIH ODS]. However, we must be clear that this assessment is based only on the calcium ingredient, as data for the full proprietary blend is not available. You should be aware that high calcium intakes might increase the risk of heart disease and prostate cancer [NIH ODS].

How it works

Think of calcium as a building block for your bones and a signaling agent for your nerves and muscles. It supports bone mineralization and helps with muscle relaxation and nerve signaling [NIH ODS]. For this product, the exact amount of calcium per serving is not listed, so you cannot confirm the dose from the provided data.

Safety profile

FDA received 592,059 total adverse event reports for this brand, though this number covers all products, not just this one. For calcium specifically, high levels in the blood and urine can cause poor muscle tone, poor kidney function, low phosphate levels, constipation, nausea, weight loss, extreme tiredness, frequent need to urinate, abnormal heart rhythms, and a high risk of death from heart disease [NIH ODS]. Calcium can also reduce the absorption of several medications, including bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS].

Our recommendation

Our recommendation: Because the exact calcium dose in this product is not available, you should not rely on it as your primary calcium source. If you take other medications, take them at least two hours apart from this supplement to avoid absorption issues [NIH ODS]. We recommend consulting your doctor before starting this supplement, especially if you have a history of kidney problems or heart disease [NIH ODS].

Supplement labels contain several key sections regulated by the FDA:

• Serving Size — The recommended amount per dose. Always check this — some products require multiple capsules per serving.
• Amount Per Serving — Shows the quantity of each nutrient in the product, typically in IU (International Units), mg (milligrams), or mcg (micrograms).
• % Daily Value (%DV) — Indicates how much a nutrient in a serving contributes to a daily diet. 5% DV or less is low; 20% DV or more is high.
• Other Ingredients — Lists inactive ingredients like fillers, binders, and capsule materials (e.g., gelatin, cellulose, magnesium stearate).
• Suggested Use — The manufacturer's recommended directions for taking the supplement, including timing and dosage.

Source: FDA Dietary Supplement Labeling Guide